Hope, which 7 chemo\'s?

Jojo and others, I have been on Adrimycin, Taxotere, Taxol, Carboplatin, Navelbine, Xeloda, Gemzar, and combinations of these. I also have been on Herceptin with all of these chemos except with Xeloda. My onc.said they were antagonistic to each other. So for the past 3 months, I haven't had Herceptin. Since I am HER2Nu positive, I don't know if that is the problem. I am also ER/PR negative. Thanks for your reply.